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  <script>
    const data = [
      { id: "01", name: "张大大", pid: "", job: "项目经理" },
      { id: "02", name: "小亮", pid: "01", job: "产品leader" },
      { id: "03", name: "小美", pid: "01", job: "UIleader" },
      { id: "04", name: "老马", pid: "01", job: "技术leader" },
      { id: "05", name: "老王", pid: "01", job: "测试leader" },
      { id: "06", name: "老李", pid: "01", job: "运维leader" },
      { id: "07", name: "小丽", pid: "02", job: "产品经理" },
      { id: "08", name: "大光", pid: "02", job: "产品经理" },
      { id: "09", name: "小高", pid: "03", job: "UI设计师" },
      { id: "10", name: "小刘", pid: "04", job: "前端工程师" },
      { id: "11", name: "小华", pid: "04", job: "后端工程师" },
      { id: "12", name: "小李", pid: "04", job: "后端工程师" },
      { id: "13", name: "小赵", pid: "05", job: "测试工程师" },
      { id: "14", name: "小强", pid: "05", job: "测试工程师" },
      { id: "15", name: "小涛", pid: "06", job: "运维工程师" }
    ]
    //父级和子级的关系是 父级的id 是子级的pid
    function transTree(list){
      // 转换后的数组
      const treeData=[]
      // 遍历 得到每一项对象 都可能会有下一级 添加children字段
      list.forEach(item=>{
        item.children=[]
        // 如果没有pid 说明是最高级 直接push到treeData数组里面
        if(!item.pid){
          treeData.push(item)
        }
        // 筛选数组 父级id=子级pid 返回
          
        // const children1 = list.filter(data=>data.pid===item.id)
        const children1 = list.filter(data=>{return data.pid===item.id})
        item.children=children1
      })
      return treeData

    }
    const tree = transTree(data)
    console.log(tree);
  </script>
  






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